Cushion-back dipper



June 24, 1930. w. J. MULLALLY CUSHION BACK DIPPER Fild May 5. 1927 Q 3 a W M F lzjrea u gum/O1 u 1-;11.-rm STATES nutmtr, or cnxcseo smears, rumors, essence 1"0 AMERICAN. MANGANESE s'rnnx. coursnv, or cmcseo, rmqmors, s conronsrron or mama I for thejgenera'l purpose of cushioning theram: June 24, 1930 PATENT oFncE I cosmos-men n nrnn Application fled-Kay 5, 1927-. Serial Ito. 189,121; I

, Thei'nvention relates to a'dipper and more particularly to'meansattached to a' dipper i shocks incident. to operation.

Formert' itlie': connections between; the dip'pe'rstic and the dipper were of n d or semi-ri'gid'construction formed by ei 'er a direct connection through the dipper casting v and the dipper back by means otpmtles, or from the dipper'stick to the dip rback through: a dippe links.

Anobjec't ofthe invention is to provide means to' prevent damage to the dipper bucket or 'dlpper stick in o oration.

Another ob ect is to provi 0 means for absorbing shocks to thereby eliminate breakage of the dipperback-or dipper stick casting', or wreckin the holding pintles.

A more speci c object is to provide springs or other cushioning means to absorb the shocks incident to piper-anon ofthe dipper,

which shockswoul otherwise have to be absorbed by the pinio'ns A further-object is to provide means to absorb shocks and therefore allow a 1i hter Structure to be built for the'same work, t e're-' operation.

by'eifecting asavin in the course-0f construction and also ,el1minate breakagetherebyefiecting a a With thesieand mastitis" time in view the" inventionmay consist-.of-eertain.

S110 t eYinveiition app tw nove features of constriiction aiid operation as willbe more fullydescribed and particu larly pointed out in the-.spedification; draw legs and claims a 'ded heretdf r Inthe draw used-" to deer ate 1 igure "3 substantially on lines-30f Figure 1 and 1 looking in the direction of the arrows.

- I In general, A represents the usual dipper '12 The stick casting sin the see;

a I ,-'which illustrate enema -;.bodi1i1ent of the, vice and whereindiltef 'erencecharacters are partspose cushioning members I) between the dipr bucket and links, for the pur ose and ythe means to be more particular y pointed out. casting an suitable More particularly, 1 represents the dipper bucket provided with the loading front 2 which may be provided with the usual teeth to the bucket. 10 represents the dipper stick carryin the dipper stick casting 11 fastened thereto y any suitable means-such as rivets is provided with lugs lit-which are adapts to support the bucket by means of the p'intles 14 passing through said lugs and through elongated slots 19 in lugs oriears 15 on the dipper back.

Disposed in a recess formed by stifiening ribs 26,-is a lug 17 around which is positioned a cushioning spring 16 which is disposed between the dipper bee and stick casting. Dis osed between the top of the dipper buc ct andthe stick casting and connected thereto; isa link 24 fastened to the casting v by means at the intle '25 and to the dipper bucket through t e lugs or cars 28 by means of thepintle 14 disposed in slots 19 pros vidcd preferably in the 111 The stiffening ribs 27 corresponding to t e ribs 26 are also v provided on either side of this intle 14' to form a recess in which the lug 1 and spring 16 are disposed in a manner similar to that he linkand stick casting may conveniently v provided with a recess 23 in way of the a springs for carrying said springsto thereby is. a; sectional plana'viewftak'en" prevent any slippage-which 'might be caused due to any movement between the parts. Ityis', of'course, understood that the coil springs 16 are merely an illustration of a pre- 3 I The1front is provided with 9. depending flatch 5 for locking the bottom dump door 6 ;=p royidedfor-the lower supporting pintle.

ferred embodiment of the invention and that any other cushioning means such as leaf springs disposed preferably between the ribs 26 or 27, may be provided, or that any other cushioning means may be provided such as rubber blocks disposed in recesses such as 23 which might be provided in both or either of the supporting means and the dipper back. It is also to be understood that the recesses 19 may just as easily be provided in the stick casting, lugs and the links, in which case the pintles will not move in operation as they will be held in the usual holes in the bucket ears. Or the upper spring may be disposed between the link and the pintle 25 instead of between the link and the dipper back. It is i I therefore to be understood that the device shown is merely by way of illustration as other and various forms of the device will, of course, occur to those skilled in the art.

I claim: 1. In a device of the character described,

the combination of a dipper stick, a dipper bucket, recesses in said bucket and stick, and

cushioning means in said recesses.

2. In a device of the character described, the combination of a dipper stick, a dipper bucket loosely connected to said dipper stick, recesses in said bucket and stick, alug in one ofsaid recesses, and cushioning means bepween said recesses and associated'with said 3. In a dipper bucket, supporting lugs on the dipper bucket, positioning lugs on said bucket between said supporting lugs and cushioning means held by said positioning lugs between said dipper bucket and a support thereof.

4. In a device of the character described, the combination with a support, a dipper bucket, supporting ears on the dipper bucket, lugs between said ears, recesses in said sup port, and cushioning means associated with said lugs and recesses.

5. In a device of, the character described,

the, combination of a dipper bucket, a support, said support comprising a bracket and a link for supporting the bucket, a resilient connection between said bracket and said.

mitting a. limited relative movement between said bucket and said support.

6. In combination with a support, a dipper, securing means between said support and dipdisposed on said dipper and forming recesses with adjacent members carried by said dip- 1 per, cooperating members havingrecesses t0 therein carried by said support, and resilient members disposed in said recesses formed by said securing and adjacent members and in secured to a dipper stick, a pintle connecting sald bucket and said bracket, said bucket havpintle, positioning lugs formed on said bucket and resilient 'means centered by said lugs bearing against said bracket and said bucket to resist relative movement.

8. In excavating apparatus, a dipper bucket, a supporting bracket adapted to be secured to a dipper stick, a pintle connecta ing said bucket and said bracket, said bucket having elongated openings allowing movement of said bucket relative to said pintle, positioning lugs formed on said bucket, said bracket having recesses opposite said lugs and resilient means held recesses. 9. In excavating apparatus, a longitudinal by said lugs and. said dipper stick, a dipper bucket of the type com prising a digging front, a discharge door and.

a supporting back disposed parallel to the digging front, said dipper stick bein disposed at a right'angle to the plane 0 said back, loose connection means between said dipper stick and said back and means for guiding the bucket for limited movement-in a direction longitudinal of said dipper stick.

10. In excavating apparatus, a longitudinal dipper stick, a dipper bucket of'the type comprising a digging front, a discharge door and a supporting back disposed parallel to the digging front, said dipper stick being disposed at a right angle to the plant of said back, loose connection means between said dipper stick and said'back, means for guiding elongated openings allowing limited movement of said. bucket relative to said ing the bucket for limited movement in a diing elongated openings to receive said pintle connection, said openings allowing limited relative movement between said members and resilient means disposed between said members at said pintle connections.

Signed at Chicago Heights, Illinois, this- 4th day of April, 1927.

' W. J. MULLALLY.

per, said means including securing members 4 

